<?php  

if(isset($_SESSION['user'])){  
 print_r($_SESSION['user']);  
exit;  
}  
$APPID='wxa4e7830fd';  
$REDIRECT_URI='http://www.jb51.net/callback.php';//回调地址  
$scope='snsapi_base';  
$scope='snsapi_userinfo';//需要授权  
$url='https://open.weixin.qq.com/connect/oauth2/authorize?appid='.$APPID.'&redirect_uri='.urlencode($REDIRECT_URI).'&response_type=code&scope='.$scope.'&state='.$state.'#wechat_redirect';  
header("Location:".$url);  


/*//http://www.jb51.net/callback.php  
$appid = "wxa4e7830fd";   
$secret = "f013408d50e0c8d";   
$code = $_GET["code"];   
$get_token_url = 'https://api.weixin.qq.com/sns/oauth2/access_token?appid='.$appid.'&secret='.$secret.'&code='.$code.'&grant_type=authorization_code';  
$ch = curl_init();  
curl_setopt($ch,CURLOPT_URL,$get_token_url);   
curl_setopt($ch,CURLOPT_HEADER,0);   
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1 );   
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);   
$res = curl_exec($ch);   
curl_close($ch);   
$json_obj = json_decode($res,true);   
//根据openid和access_token查询用户信息   
$access_token = $json_obj['access_token'];   
$openid = $json_obj['openid'];   
$get_user_info_url = 'https://api.weixin.qq.com/sns/userinfo?access_token='.$access_token.'&openid='.$openid.'&lang=zh_CN';   
   
$ch = curl_init();   
curl_setopt($ch,CURLOPT_URL,$get_user_info_url);   
curl_setopt($ch,CURLOPT_HEADER,0);   
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1 );   
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);   
$res = curl_exec($ch);   
curl_close($ch);   
   
//解析json   
$user_obj = json_decode($res,true);   
$_SESSION['user'] = $user_obj;   
print_r($user_obj); */  
?>  